Half to william r



(No Model.)

D. L. HERR. PIPE THRBADING MACHINE.

No. 591,967. Patented Oct. 19,1897.

UNITED STATES- PATENT OFFICE.

DAVID L. HERR, OF LOCK I-IAVEN, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO WILLIAM R. HERR, OF SAME PLACE.

PIPE-THREADING MACHINE.

SIECIFICATION forming part of Letters Patent No. 591,967, dated October 1.9, 1.897.

Application filed February 15, 1897. Serial No. 623,464. (No model.) y

Be it known that I, DAV'ID L. HERR, a citizen of the United States, residing at Lock Haven, in the county of Clinton and State of Pennsylvania, have invented a new and useful Pipe-Threading Machine, of which the following is a specification.

My invention relates to pi pe-th reading machines, and has for its object to provide a simple and efncient construction and arrange- Vment of parts whereby a thread may be formed without the rotation of the frame or of the pipe, to allow the device to be clamped firmly upon the pipe.

Further objects and advantages of this invention will appear in the following description, and the novel features thereof willbe particularly pointed out in the appended claims. y

In the drawings, Figure l isa perspective view of a machine embodying my invention arranged in the operative position upon a pipe. Fig. 2 is a central longitudinal section of the same. Fig. 3 is a transverse section on the line 3 3 of Fig. 2. Fig. 4 is a detail view of one of thevjaws of the clamp detached.

Similar numerals of reference indicate correspondingparts in all the figures of the drawbe accomplished by using clamping-rings of different sizes.

Mounted for lateral movement and adj ustment upon the front ends of the clampingrings is a frame 3, of approximately rectangular form, having opposite sides provided with seats e to engage guides 5 on the front extremities lof the jaws, said guides consisting of T-heads, whereby the jaws are capable of independent adjustment and separate application to the frame.

Mounted for rotation uponthe frame is a die-carrier consisting' of a disk 6, peripherally mounted in seats formed in` the'inner edges of the respectively opposite sides of the frame 3, said diskbeing heldin place by means of plates 7, and Ya die-plate h'older S,

which is of annular construction corresponding with that of the disk 6 and is carried byv the' latter. The'die-holder is provided with opposite guides 9 to receive the dieplates l0,and the holder is yieldinglymounted upon the disk 6, which forms the body portion of the die-carrier, to provide for the longitudinal feeding of the die as the threading operation proceeds. The connections between the yielding holder-and the disk 6 include guide-pins 1l, and preferably coiled upon these guide-pins and interposed betweenthe contiguous surfaces' of the die-holder and disk 6 are actuating-springs l2. j

The means which I have illustrated in the drawings for communicating rotary motion to the die-carrier consist of a driving-pinion 13, meshing with a gear formed by atoothed ring 14: on the front side of the disk 6, the spindle of said drivin g-pinion being mounted in a bearing l5 on the frame and being fitted with an operating crankor lever 16. y

In applying the apparatus to an object, as a pipe or rod, to be threaded, the clampingringis first slipped over the end of the object. The frame which carries the die-holder'is then arranged in operative position with relation to the object, as by bringing the endy of the object in contact with the die-plates, the actuating-springs of the die-holder being repressed, after which the clamp members are applied laterally to the frame, at opposite sides of the pipe or rod, and after being brought into contact therewith are secured by meansof the clamping-ring. Since the connection between the clamp members and the frame is of a sliding quality, it is obvious that the desired lateral adjustment of the dieholder may be secured by movement of the frame independently of the clamp, and that during the operation of the driving-pinion and the cutting of the die-plates into the object to be threaded the holder will be fed form a continuous thread. l Hence the clamp- IOO axially, by reason of its actuating-springs, to v jaws are separately attachable to the frame which supports the die-holder, and also are separately removable when it is desired to displace the apparatus, and as the guides on the clamp members and the seats on the frame are interlocked in all relative positions of said parts it is obvious that any desired relative transverse adjustment of the clamp members may be accomplished, to suit the diameter of the object to be threaded, without detracting from the efficiency of the apparatus. l

Various changes in the form, proportion, and the minor details of. construction may be resorted to without departing from the spirit or sacrificing anyof the advantages of this invention.

Having described my invention, what I claim is- 1. In a pipe-threading machine, the combination of a clamp having separate jaws for contact with opposite sides of an object to be threaded, said jaws having divergent outer surfaces and a coperating clamping-ring, and threading devices having a frame upon which the jaws are detachabl y mounted, substantially as specified.

2. In ay'pipe-tllreading machine, the combination of a clamp having separate jaws to bear against opposite sides of an object to be threaded, said jaws being provided with divergent outer sides and spaced seats or notches, a clamping-ring encircling said jaws to en'- ga'ge the seats or notches, and threading devices having a frame upon which the jaws are detachably mounted, substantially as speci'- e'd.

3. In a pipe-threading machine, the combination with a frame and means for attaching the same to an object to be threaded, of arot-ary die-carrier mounted upon the frame and having a yielding die-holder capable of axial movement, and means for communicating motion to the die-carrier, substantially as specified.

4. In a pipe-th reading machine, the combination with a frame and means for attaching the same to an object to be threaded, of a rotary die-carrier mounted upon the frame, and including an annular die-holder yieldingly mounted for axial movement, guide-pins for the die-holder, and actuating-springs for advancing the holder, and means for communieating motion to the die-carrier, substantially as specified.

5. In a vpipe-threading machine, the combination with a frame and means for securing the same to an object to be threaded, of a rotarj7 die-carrier having an annular disk mounted between the sides of the frame and peripherally fitted in seats formed in the inner edges thereof, a die-holder normally spaced from said disk, and means for yieldingly maintaining the die-holder in its nor-4 mal position, said disk being provided with a gear, a driving-pinion meshing with said gear, and an operating lever or handle connected to the spindle of the driving-pinion, substantially as specified. r

6. In a pipe-threading machine, the combination with a frame and threading devices mounted thereon, of a clamp for engaging an object to be threaded, having separate jaws detaehably mounted upon the frame in terminally-open guides for independent transverse adjustment and removal, and means for securing the jaws in their adjusted positions, substantially as specified.

7. In a pipe-threading machine, the combination of a frame and vthreading devices mounted thereon, said frame being provided with transversely-alined undercut guides open at opposite sides of the frame, and a clamp having separate jaws provided with slides iit-ted in said guides, and independentlyA removable at the outer ends thereof, and means for securing the jaws in their adjusted positions, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto aftixed my signature in the presence of two witnesses.

DAVID L. HERR.

Xlitnesses:

T. M. SrEvENs'oN, J. H. FREDERICK. 

